Tungsten oxide can exhibit photocatalytic activity under certain conditions, and has potential applications such as decomposition of organic matter and water splitting. Tungsten oxide (WO3) has shown good performance in the field of photocatalysis. The following are several aspects about the photocatalytic performance of tungsten oxide:
Light Absorption Capacity
Tungsten oxide has good light absorption ability in the range of visible light and ultraviolet light. Its bandgap energy is between 2.5-3.0 electron volts, allowing it to absorb the energy of visible light and a portion of ultraviolet light. This absorbing ability enables tungsten oxide to use light energy to catalyze reactions.
Generation Of Photogenerated Electron-Hole Pairs
When tungsten oxide absorbs light energy, electron-hole pairs are created. These photogenerated carrier pairs play a key role in the catalytic process. Electrons and holes can participate in redox reactions and promote catalytic reactions.
Oxidation Activity
Tungsten oxide exhibits good oxidation activity and can participate in oxidation reactions. It can promote the oxidative degradation of organic matter, water oxidation and other oxidation reactions under light conditions.
Photoactive Reactive Oxygen Species (ROS) Generation
In the photocatalytic process, the photogenerated carrier pairs generated by tungsten oxide can react with oxygen molecules to generate active oxygen species (such as hydroxyl radicals and superoxide radicals, etc.). These active oxygen species have strong oxidizing ability and can be used to decompose organic pollutants and inhibit bacteria, etc.
Visible Light Responsiveness
Certain doping and modification methods can improve the catalytic activity of tungsten oxide in the visible light range. For example, by doping metal ions, noble metal nanoparticles or carbon materials, etc., the light absorption ability of tungsten oxide can be extended to the visible light region, thereby improving the visible light catalytic performance.
Tungsten oxide has the characteristics of good light absorption ability, photogenerated carrier generation, oxidation activity and active oxygen species generation in photocatalysis, making it widely used in water treatment, air purification, organic pollutant degradation and light energy conversion. Application prospects.
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